Shift lock



MORRIS SHIFT L Filed June; 1924 Patented Feb. 3, 1925.

PATENT OFFICE.

HAROLD L. MORRIS, OF BERKELEY. CALIFORNIA, ASSIGNOB. T RUGKST'ELL .SALESAND MANUFACTURING COIJZPAIIY, GF BERKELEY, CALIFORNIA, AzCORPOEATION 0 FCALIFORNIA.

SHIFT LOCK.

T 0 all whom it may concern:

Be it known that I, HAROLD L. MORRIS, a citizen of the United States,residing at Berkeley, county of Alameda, and State of California, haveinvented new and useful Improvements in Shift Locks, of which thefollowing is a specification.

This invention relates to shifting devices for gears, clutches, sleeves,and the like elements, which elements are ordinarily mounted for axialmovement on a shaft of the mechanism being operated.

Insuch devices ofthe type comprising my invention, a rotatable shaft hasa shifting yoke-mounted thereon and connected to the element to beshifted. Rotation of the shaft operates through the yoke to shift theelement axially to different positions along its shaft. li leans mustbepr-ovided for holding the element in anyone of these positions, and itis the primary object of my invention to provide improved means incombination with the device for performing this function.

It is another object of my invention to provide. a very compactlyarranged resiliently acting means between the shifter shaft and theelement to be shifted, whereby the element will be auto-matically heldin any one of its shifted positions.

It is a further object of my invention to )YOVlClG an axially movablespring pressed plunger mounted preferably in the body portion of theyoke and cooperating with notches carried by the element forautomatically holding the element in any one of its shifted positions.

With the above and other objects in view, my invention consists in thefeatures of construction and operation set forth in the followingspecification, and illustrated in the accompanying drawing. In suchdrawing annexed hereto and forming a part of this specification, I haveshown one specific embodiment of my invention, but it will be understoodthat the invention can be otherwise embodied, and that the drawing isnot to be construed as defining or limiting the scope of the invention,the claims appended to this specification being relied upon for thatpurpose.

1924. Serial No. 717,520.

Referring to the figures ofithe drawing:

Fig. 1 is a fragmentary sectional-view of my improved shifting devicecooperating with an element to be shifted thereby.

Fig. 2 is a sectional view :thereof taken on line 22-of Fig. 1.

Referring more specifically to the drawing by reference characters, 1indicates a portion of a casing in which is rotatably mounted a shiftershaft 2. A. yoke 3 is mounted on a squared portion 4 ofthis shaftbetween the bearings 5 and 5 of the casing. The yoke comprises a bodyportion 6 ad jacent the shaft 2 and a forked portion 7.

The element 8' to be shifted is mounted for shifting movement on a shaft9 extending transversely of the shaft '2. A U-shaped block or shoe 10supported on pivot pins 11 in the forked portion/7 of the yokeis'loosely seated in an annular groove 12in this element. From theconstruction described, it will be apparent that rotation of the shaft 2in one direction or the other will operate to axially shift the element8 respectively in one direction or the other along its shaft 9.

My improved means for holding the element in any of its shiftedpositions comprises a plunger 13 mounted for longitudinal movement inthe body portion 6 of the yoke. A compression spring 14: normally forcesthe plunger upwardly into engagement with the bottom of the shoe 10.This portion of the shoe has V-shaped, notches 15 formed therein forreceiving the end of the plunger. While only two of such notches areshown in the drawing, it*will be understood that as many notches areprovided as the element has shifted positions.

The shaft 2 can be rotated by means of an arm 16 secured to the endthereof. A rod 17 connected to the free-end of the arm may be extendedto a position convenient to the operator. It will be understood thatmovement of the rod longitudinally in one direction or the other willrotate the shaft 2 and shift the element 8 axially in one direction orthe other, respectively.

In Fig. 1 the element 8 is shown in full lines in its right hand shiftedposition, and the plunger 13 is engaged with the left hand notch 15 tohold the element in such position. Movement of the rod 17 downwardlywill operate to shift the element to its left hand position, the spring14 compressing to permit rearward movement of the plunger 13 andthereafter expanding to force the plunger into the right hand notch andhold the element in itsleft hand position. This latter position is shownin dot and dash lines in Fig. 1. In each of these holding positions, itwill be noted that the plunger is to one side or the other of thevertical, whereby it operates to very securely perform its holdingfunction.

The construction and operation of my invention and its severaladvantages will be apparent without further description herein. Itshould be particularly noted, how ever, that my improved holding meansis most compactly arranged entirely within the shifting yoke. Thisarrangement eliminates the protruding and objectionable parts usuallyincident to such mechanisms, and fully protects the mechanism frombreakage, dust, and other foreign matter. The mechanism is furthermoreentirely automatic in operation and performs its holding function withgreat security.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

l. A shafting device comprising the combination of a rotatable. shaft, alaterally extending yoke connected to the shaft and adapted to engage anelement to be shifted, and a longitudinally movable spring pressedplunger carried by the shaft and having a wedging engagement with theelement for holding the element in its different shifted positions.

2. A shifting device comprising the combination of a rotatable shaft, alaterally extending yoke connected to the shaft and adapted to engage anelement to be shifted, and means having a yielding engagement with theelement for holding the element in its different shifted positions.

3. A shifting device comprising the combination of a rotatable shaft, alaterally extending yoke connected to the shaft and adapted to engage anelement to be shifted, and a spring pressed plunger carried by the yokeand cooperating with spaced notches for holding the element in itsdifferent shifted positions.

-l. A shifting device comprising the combination of a rotatable shaft, alaterally extending yoke connected to the shaft, the yoke comprising abody portion adjacent the shaft and a forked portion adapted to beconnected with an element to be shifted, and a spring pressed plungercarried in the said body portion between the shaft and forked portionfor holding the element in its different shifted positions.

5. In combination, a shaft, an element shiftable axially thereon, asecond shaft extending transversely of the first shaft, a yoke connectedfor rotation with the second shaft and to the said element, rotation ofthe second shaft being adapted to shift the element to different axialpositions, and means between the second shaft and element for holdingthe element in such positions.

6. In combination, a shaft, an element shiftable axially thereon, asecond shaft extending transversely of the first shaft, a yoke connectedfor rotation with the second shaft and to the said element, rotation ofthe second shaft being adapted to shift the element to different axialpositions, and means housed within the yoke between the second shaft andelement for holding the element in such positions.

7. In combination, a shaft, an element shiftable axially thereon, asecond shaft extending transversely of the first shaft, a yoke connectedfor rotation with the second shaft and to the said element, rotation ofthe second shaft being adapted to shift the element to different axialpositions, and resiliently acting means between the second shaft andelement for holding the ole ment in such positions.

8. In combination, a shaft, an element shiftable axially thereon, asecond shaft extending transversely of the first shaft, a yoke connectedfor rotation with the second shaft and to the said element, rotation ofthe second shaft being adapted to shift the element to different axialposit-ions, and means including a spring pressed plunger between thesecond shaft and element and cooperating with the yoke and element forholding the element in such positions.

9. In combination, a shaft, an element shiftable axially thereon, asecond shaft extending transversely of the first shaft, a yoke connectedfor rotation with the second shaft and to the said element, rotation ofthe second shaft being adapted to shift the element to different axialpositions, and a spring pressed plunger carried by the yoke andcooperating with notches carried by the element for holding the elementin such positions. I

10. In combination, a shaft, an element shiftable axially thereon andprovided with an annular groove therein, a block mounted in the groove,a second shaft extending transversely of the first shaft, a yokeconnected for rotation with the second shaft and to the said block,rotation of the second shaft being adapted to shift the element todifferent axial positions. and means including a spring pressed plungerand cooperating notches therefor between the second shaft and elementfor holding the element in such positions.

11. In combination, a shaft, an element shaft being adapted to shift theelement to shiftable axially thereon and provided with different axialpositions, and a spring an annular groove therein, a block mountedpressed plunger carried by the yoke and co- 10 in the groove, a secondshaft extending operating with notches in the block for 5 transverselyof the first shaft, a yoke conholding the element in such positions.

nected for rotation with the second shaft and to the said block,rotation of the second HAROLD L. MORRIS.

